Infantile sexuality

Early in his work, Sigmund Freud recognized that young children had an intense orientation toward pleasure and considered these aspects of sexuality in a broad sense that encompassed oral pleasure related to eating and stimulation of the mouth, anal pleasures focused on sensations around the anal sphincter and the sense of control, as well as sexual feelings focused on the genitals. 

See Oedipal complex, Psychoanalysis, Superego